Rotary engine.



No. 7l0,730. Patented Oct. 7, I902.

J. ZURA.

ROTARY ENGINE.

(Application filed June 12, 1902.)

(No Model.)

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NiTEn STATES PATENT OFFICE.

JOSEF ZURA, OF BERLIN, GERMANY.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 710,730, dated October '7, 1902.

Application filed June 12, 1902.

To (LZZ w/wm/ it may concern.-

Be it known that I, JOSEF ZURA, a subject of the German Emperor, residing at the city of Berlin, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Rotary Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention treats of the distributing motion of the resisting slide-valve for engines with rotating pistons.

The object of this improvement is to lift and keep the resisting slide-valve on its seat by means of disks with the same accuracy for both the backward and forward movements of the winged piston. The'rods forlifting the slide-valve, being required to exercise their strength of extension only, may be of small dimensions.

My invention consists in the combination of complementary cam-disks attached to the driving-shaft and of drawing-rods connected to levers, which drawing-rods are actuated by the aforementioned disks and connected to the slide-valve.

In the accompanying drawings, Figure 1 represents a view of the motor, on which the bar h is shown as broken ofi. Fig. 2 is a view of the motor turned around to ninety degrees. Fig. 3 shows the bar h, represented in Fig. 1 as broken. Fig. 4 shows the details of the bearings of the levers connected to the drawing-rods.

A shoulder Z) is cast on the upper part of the steam-cylinder a, to which a bearing-truss c is attached. The shaft (Z is adjusted in the truss c at both ends. To the shaft (Z and in the middle of the cylinder a a jointed lever c is attached, which is connected by a joint to the spindle g of the cut-off slide-valve. Alever 0 is keyed to one end of the shaft (Z and serves to take up the drawing-rod h and the thrusting-bar h", which latter is in two parts, being provided for this purpose with a firmlyscrewed bolt 1', 'Fig. 4, projecting from both sides. Abearing-bracketm,carryingthelever Zr, is firmly bolted to the foundation-plate 7i;

Serial No. 111,349. (No model.)

of the motor. This lever h is attached to one end of the roller 7', while the other end is forked and jointed to the connecting-rod 72.

In order to control the movement of the levers e and e in all positions, another lever h' is keyed to a shaft 1.0 and adjusted rotatively under the lever 7L in the bearing-bracket m in such a manner that the connection of the thrusting-bar Zr on t-heone hand with the bolt i on the other. hand is effected with the lever h screwed to the end of the shaft to. The lever h carries a roller 0", which rolls on the periphery of the disks Z and does not permit the check-valve to be lifted until the disk Z, with the notch shaped according to the form of the lifting-disk Z, runs against the roller 0".

The drawing-rod h, as well as the thrusting-rod h, enables the pressure of the checkvalve to be accurately regulated. For this purpose the thrusting-rod h is made in two parts which are movable in one another. Two adjustable nuts n n and a spring f, bent between same, give a certain amount of elasticity to the rod h.

In order to counteract the effect of wear on the slide-valve and piston-drum and to cause the former to automatically move around the worn-down material, a sliding piece is ad j usted in the connecting-rod 7L in such a manner that when the slide valve is raised by the lever 7t the slide g is compelled 'to run a certain length of clearance before it sits on the screw it, screwed to the head of the connecting-rod. The lifting of the slide-valve by means of the disk Z, as well as the raising of the connecting-rod, is not effected until the slide g sits on the screw it, while the closing of the slide-valve is effected automatically by means of the disk Z in combination with the other levers and the thrusting-rod h. A spring f" presses against the. slide g, thus compelling the roller r to roll on the disk Z.

The motor is operated in this connection as follows: The driving-shaft of the motor rotates when the slide-valve, which is situated on the driving-shaft, is revolved by the steam entering same. When the driving-shaft is rotated, the disksZ and Z are caused to revolve. The disk Z, on which the roller runs, causes, by means of the notch in same, the re tation of the shaft w and the movement of the lever h. This movement of the lever h corresponds to the movement of lever 7z,' efiected by the disk Z, owing to the elevated part of the latter. So long as the concentric parts of the disk Z and Z act on the levers h and 7b the check slide-valve remains fixed on its seat, whereas when the notch on the disk Z and the hump on the disk Z take effect the slide-valve is lifted. Both the rods hand It relax the movement to a slight extent. The winged piston may rotate to the right or to the left. The effectremains the same.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is as follows:

1. In a valve-actuating mechanism for rotary engines, the combination with the main shaft, of complementary cams on said shaft, a rock-lever to actuate the valve, rods connected to the rock-lever, one to positively move the rock-lever in one direction and the other to positively move it in the opposite direction, and each rod operated from one of the aforementioned cams to produce an equal and simultaneous movement of both of the rods, substantially as described.

2. In a valve-actuating mechanism for rotary engines, the combination with the main shaft, of complementary cams thereon, a rocklever to actuate the valve, two rods connected to the same point of said rock-lever, one to positively move the rock-lever in one direction and the other to positively move it in an opposite direction, a lever connected to the end of each rod, a roller on the ends of said levers adapted to ride on the respective cams, substantially as described.

3. In a valve-actuating mechanism for rotary engines, the combination with the checkvalve and driving-shaft, of complementary cams on the shaft, a rock-lever to actuate said valve and having two arms a and e, rods h and h connected to the arm 6', a lever engaging each cam and a rod, said rod it having a notch inits end, an adjusting-pin projecting therein and a spring in said notch between said rod and its lever to form ayielding connection above said pin, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

JOSEF ZURA.

Vtitnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

